Sure Delete
Permanently wipe all traces of a file from your hard drive with Sure Delete. Did you know that if you deleted a file, it isn’t really gone because Windows just marks the space they occupied as being available. And anyone with a program such as Restoration could probably recover them, meaning that personal data could get into the wrong hands. The author of Sure Delete says that this free program deletes the file, then wipes and removes the data left over.
The author has stopped updating or supporting the program, but it appeared to work fine in my informal tests. I was unable to recover several test files that I deleted with it. The program has three deletion methods: a quick wipe (which overwrites the file 4 times, a Department of Defense method (which overwrites the file 7 times with random data), and a Super Secure mode which overwrites it an impressive 24 times.
Source: PC World
I’m not convinced that Sure Delete does a thorough job of destroying files. There have been times that I deleted a folder using the 24 pass method, and the tool tip window stated that there was still 938 kb in the folder. I then ran it through DPWiper and that completely cleared it. This has happened repeatedly in the 2 months that I have used it. Would like to know if anyone else has had that problem with it.